Magneto



Feb. 20, 1923. i 1,446,040

H. F. GE|ST MAGNE'I'O ATTORNEY D 2 shee ts-sheet 2 m "3 INVENTOR {funny F G-ms-r BY TORNEY Feb. 20, 1923;

. "allw hom'iit I tn: bddy of the mjabhme wluiouc il'i' rba "A' vefy satisfaetbry fmethodbf "c0 IE t known that 1, "HARRY; Ge a citizenefthe. Uhite q States md (re Improvements in Ma gxietes,i of, .whiehflzth fdllo'wilig isfi a deseri ptioig reference beiiig ip nym i rew i ss wh ""as'f herel he invention is grail-featuresheriiitfter set iqrth, an m e For 1 'eonv'emence' explan I, St to ether with'i'ts ji oprjation thereafter. ix

The frame 51?! fm in 'c oji sists bf 51 arated bymmmagnem are 12 fofmihg am or 'bere;,adabtedtorecive an: induic rotoriishereinafterdescribed,

I I e' and 11 i11 oneirbngw sti igf biped-fin 'su ch 'a Way by tie sections thatf'th oring'xopra'tiolg would magnetically i separate f them; :5

hihe" isj'ji'eniovable fro'mlthe "machine frame 5' formi; W 11 C i 7; insu lateel' a One terminal i of th $1015 rec 1 thereto a s a f @A 1ead25 which attaches tdth'exi gn'iter of?" f the engine (not?v shown) 'Jis' secured to the,

insulated-block v 22 screw 26 ,beingepre tect ed and-ifisu lated'i'frdni the irm-ire by a I bushing" 27 of suitable irisiilatifig"mafiepial.

The machine is further provided with top cover 28 which may be made of iron. This top cover is secured to the frame of the machine by screws 29.

The rotor or inductor consists of a plu rality of laminae 30 having a plurality of radially projecting prongs. These laminae are clamped together forming a rotor body by means of rivets 31 and are pressed upon a shaft 32 in a manner well known to the art. The rotor is further provided with pair of spacer collars 33 pressed upon the shaft 32, for centrally locating the rotor bod The rotor i further journaled at each end in bronze or other suitable bearings 3% which are pressed. into bearing plates Bearing plates are of non-magnetic ma terial for the construction shown, but for a modification of the frame shell casting 11 they may be made of iron. These bearing plates 35 are dowelled to the tunnel of the machine and secured thereto by means of screws 36.

Shim washers 37 are provided between parts 33 and 84c at each end of the shaft to take care of end play. The bearings are oiled through parts 38 or other suitable means.

A pair of magnets 39, of the flat arched type are secures to the sides of the machine by SCIGWSQO, like poles contacting with the base casting and other like poles contacting with the iron shell casting 11 and with parts of the upper removable pole piece which project through slots 14 of casting 11, without interfering with the removability of saidpart 15 from the machine.

From the construction of the machine, it is evident that the base casting 10 represents one pole piece of the magnetic field by contact with the magnets 39, and that part 15 representsthe opposite pole piece by contact with the shell casting ll which is of iron and which contacts with the magnets 39 and also by direct contact of 15 with 39 as described. lt is also evident that the construction anticipates either the magnetic contact between parts 15 and 39 alone or between parts 1i and 39 alone, in which latter case 15 will be magnetically polarized by 39 through the medium of portion 11. Both the pole pieces 15 and 10 terminate with. certain areas at the tunnel of the machine.

The rotor 30 represents a plurality of radially projecting prongs which coact both with the pole piece 10 and. the pole piece to generate energ' in the windings 1? in a manner well known to the art.

It is well known that, during the process of energy generation in the windings 17, produced by flux shifted from the central polar projection to the outside lay-pass pol r projections of part 15 or vice versa, reactive flux forces are established in the coil and a iao io take paths through the polar projections of part 15. Since the iron shell casting r agnetically connects the two outside by-pass polar projections, it also will be subject to the reactive flux forces,increasing as it does the permeability of the paths and hence increasing the inductance per turn the coil. Shell casting ll, therefore forms a magnetic as well as a mechanical. housing for the windings.

While this rotorinay perform such generation by continuous rotation, this type of machine finds its n'iost advantageous use in such systems as employ springs for the actuation of the rotor.

l While the machine shown herewith represents a low tension magneto, it can by employing suiiicient number of turns to the coil 17 and suiacient speed of motion to the rotor be made to deliver a jump spark. Or by providing the machine with a primary and a secondary winding, together with a suitable interrupter for the primary circuit and condenser for the interru ter, a machine of the conventional high tension type may be constructed embodying the principal features of this invention.

i am aware that the specific construction details herein described are subject to modificationand change and T therefore desire it understood that such and modifications as come within the scope of the appended claims are within the spirit of my invention.

ll hat claim as my invention is- 1. in an inductor type magneto, the combination of a field magnet provided with an iron base pole piece of one magnetic polarity and an iron shell portion of OPPOSMG polarity, and a removable soft iron pole plece including a plurality of polar projections and carrying windings, said soft iron pole piece being adapted to be supported by and of the same magnetic polarity ds said shell portion, said shell portion having walls substantially parallel to sides of said wind ings formed by coiwolutions of equal pe riphery and forming a magnetic housing for said windings, and a rotor adapted to be actuated betwcei said pole pieces for energy generation in said windings. U

2. in an inductor type magneto, the com bination of a field structure comprising a field magnet, a frame and a coil structure. said frame including magnetic pole piece of one polar" :1 iron shell casting oi opposite pol said coil structure 'ndluda soft iron p piece liarlig spaced n i we:

apart polar projections and carrying windings, said iron shell casting forming a magnetic housi for said windings and adapted to support said coil structure, and a rotor adapted to be actuated between said pole pieces for energy generation in said windings. I V 

